I am a new home-moaner and have recently noticed an increased amount of mortar dust around my fireplace. I can see through the crack to the outside. So i wiped up the dust, went about my way. The next day, the mortar dust was there again! What critter could be doing this, how do i get rid of it, and how do i fix my cracks???![Mad](https://homerepairforum.com/core/images/smilies/mad.png)
![Mad](https://homerepairforum.com/core/images/smilies/mad.png)
![Confused](https://homerepairforum.com/core/images/smilies/confused.png)
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